/* NeuraFrame Studio website styles. Static, dependency free.
   Tone: serious, measured, technical, not hype. No em dashes by project rule. */

:root {
  --bg: #ffffff;
  --panel: #f6f7f9;
  --ink: #0e1116;
  --muted: #5b6470;
  --line: #e6e8ec;
  --accent: #4b46e5;
  --accent-ink: #2f2ba8;
  --teal: #0f9d8f;
  --hero: #0b1020;
  --hero-ink: #e9ecf5;
  --hero-muted: #9aa3bd;
  --ok: #12855f;
  --radius: 12px;
  --maxw: 1080px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.01em; margin: 0 0 .5em; }
h1 { font-size: 2.4rem; }
h2 { font-size: 1.7rem; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.muted { color: var(--muted); }
.center { text-align: center; }

/* header / nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.9);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav .row { display: flex; align-items: center; gap: 20px; height: 62px; }
.brand {
  display: inline-block; width: 210px; height: 50px;
  background: url("assets/logo.png") left center / contain no-repeat;
  text-indent: -9999px; overflow: hidden; white-space: nowrap; flex: 0 0 auto;
}
.brand .mark { display: none; }
.nav nav { margin-left: auto; display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.nav nav a { color: var(--muted); font-size: .93rem; }
.nav nav a:hover, .nav nav a.active { color: var(--ink); text-decoration: none; }
.nav .cta { margin-left: 8px; }

/* nav dropdown */
.nav .navdrop { position: relative; display: flex; align-items: center; }
.nav .navdrop > a::after { content: " \25BE"; font-size: .8em; opacity: .65; }
/* invisible bridge so the menu does not close in the gap under the trigger */
.nav .navdrop::after { content: ""; position: absolute; left: 0; right: 0; top: 100%; height: 16px; }
.nav .drop-menu {
  position: absolute; top: calc(100% + 12px); left: 0;
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  padding: 6px; min-width: 178px; box-shadow: 0 12px 30px rgba(14,17,22,.12);
  display: none; z-index: 60;
}
.nav .navdrop:hover .drop-menu, .nav .navdrop:focus-within .drop-menu { display: block; }
.nav .drop-menu a { display: block; padding: 8px 12px; border-radius: 7px; color: var(--muted); font-size: .92rem; white-space: nowrap; }
.nav .drop-menu a:hover { background: var(--panel); color: var(--ink); text-decoration: none; }
.nav-toggle-cb { display: none; }

/* buttons */
.btn {
  display: inline-block; padding: 11px 18px; border-radius: 9px;
  font-weight: 600; font-size: .95rem; cursor: pointer; border: 1px solid transparent;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-ink); text-decoration: none; }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--muted); text-decoration: none; }
.btn.light { background: #fff; color: var(--hero); }
.btn.small { padding: 8px 13px; font-size: .88rem; }

/* hero */
.hero { background: var(--hero); color: var(--hero-ink); padding: 84px 0 72px; }
.hero .kicker { color: var(--teal); font-weight: 600; letter-spacing: .02em; text-transform: none; margin-bottom: 14px; }
.hero h1 { font-size: 2.9rem; color: #fff; }
.hero .lead { color: var(--hero-muted); font-size: 1.15rem; max-width: 640px; }
.hero .teach { font-size: 1.5rem; font-weight: 700; color: #fff; margin: 0 0 18px; letter-spacing: -0.02em; }
.hero .buttons { display: flex; gap: 12px; flex-wrap: wrap; margin: 26px 0 12px; }
.hero .fine { color: var(--hero-muted); font-size: .9rem; }

/* proof strip */
.proof { background: var(--panel); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.proof .grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; }
.proof .cell { padding: 26px 18px; border-right: 1px solid var(--line); }
.proof .cell:last-child { border-right: none; }
.proof .num { font-family: var(--mono); font-size: 1.5rem; font-weight: 600; color: var(--accent-ink); }
.proof .lab { color: var(--muted); font-size: .86rem; margin-top: 4px; }

/* sections */
section.block { padding: 64px 0; border-bottom: 1px solid var(--line); }
section.block h2 { max-width: 720px; }
section.block .sub { color: var(--muted); max-width: 720px; font-size: 1.05rem; }

/* card grids */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 28px; }
.cards.two { grid-template-columns: repeat(2, 1fr); }
.card {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; background: #fff;
}
.card h3 { margin-bottom: 6px; }
.card .big { font-family: var(--mono); font-size: 1.5rem; font-weight: 600; color: var(--accent-ink); }
.card p { color: var(--muted); font-size: .95rem; margin: 0; }
.card ul { color: var(--muted); font-size: .95rem; margin: 10px 0 0; padding-left: 18px; }
.card li { margin: 3px 0; }

/* flow line */
.flow { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 22px; font-family: var(--mono); font-size: .92rem; }
.flow span { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 7px 11px; }
.flow .arw { color: var(--muted); border: none; background: none; padding: 0 2px; }

/* bullet list */
.list { color: var(--muted); max-width: 720px; }
.list li { margin: 7px 0; }

/* code block */
pre.code {
  background: var(--hero); color: var(--hero-ink); border-radius: var(--radius);
  padding: 18px 20px; overflow: auto; font-family: var(--mono); font-size: .9rem; line-height: 1.7;
}
pre.code .c { color: var(--hero-muted); }

/* pricing */
.price { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 28px; }
.price .plan { border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; display: flex; flex-direction: column; }
.price .plan.feat { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.price .tag { font-size: .8rem; font-weight: 700; color: var(--accent-ink); text-transform: uppercase; letter-spacing: .05em; }
.price .amt { font-family: var(--mono); font-size: 1.8rem; font-weight: 600; margin: 6px 0; }
.price .per { color: var(--muted); font-size: .9rem; }
.price ul { color: var(--muted); font-size: .92rem; padding-left: 18px; margin: 14px 0 18px; }
.price .plan .btn { margin-top: auto; text-align: center; }

/* tables */
table.req { width: 100%; border-collapse: collapse; margin-top: 20px; font-size: .95rem; }
table.req td, table.req th { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
table.req th { color: var(--muted); font-weight: 600; }

/* callout */
.callout { background: var(--panel); border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: 8px; padding: 16px 18px; color: var(--ink); margin-top: 22px; }

/* CTA band */
.ctaband { background: var(--hero); color: #fff; padding: 60px 0; text-align: center; }
.ctaband h2 { color: #fff; }
.ctaband p { color: var(--hero-muted); max-width: 620px; margin: 0 auto 20px; }
.ctaband .buttons { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* footer */
footer.site { background: #fff; border-top: 1px solid var(--line); padding: 40px 0; color: var(--muted); font-size: .9rem; }
footer.site .cols { display: flex; flex-wrap: wrap; gap: 40px; justify-content: space-between; }
footer.site a { color: var(--muted); }
footer.site a:hover { color: var(--ink); }
footer.site .fnav { display: flex; gap: 18px; flex-wrap: wrap; }

/* docs / legal prose */
.prose { max-width: 760px; }
.prose h2 { margin-top: 36px; }
.prose h3 { margin-top: 24px; }
.prose ul { color: var(--muted); }
.prose li { margin: 5px 0; }
.badge { display: inline-block; font-size: .78rem; font-weight: 600; color: var(--ok); background: #e7f6ef; border-radius: 999px; padding: 3px 10px; }

/* docs layout */
.docs-wrap { display: grid; grid-template-columns: 240px 1fr; gap: 40px; padding: 40px 24px 64px; }
.docs-side { position: sticky; top: 78px; align-self: start; font-size: .92rem; }
.docs-side h4 { font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 18px 0 8px; }
.docs-side a { display: block; color: var(--muted); padding: 5px 0; }
.docs-side a:hover { color: var(--ink); text-decoration: none; }
.docs-side a.active { color: var(--accent); font-weight: 600; }
.docs-group { margin: 0; }
.docs-group > summary { list-style: none; cursor: pointer; padding: 9px 0 5px; color: var(--ink); font-weight: 600; font-size: .82rem; display: flex; align-items: center; gap: 7px; }
.docs-group > summary::-webkit-details-marker { display: none; }
.docs-group > summary::before { content: "\203A"; color: var(--muted); font-weight: 700; display: inline-block; transition: transform .15s ease; }
.docs-group[open] > summary::before { transform: rotate(90deg); }
.docs-group > summary:hover { color: var(--accent); }
.docs-group > a { padding-left: 15px; }
.docs-main { min-width: 0; }
.docs-main h1 { font-size: 2rem; }
.docs-main h2 { margin-top: 34px; font-size: 1.35rem; }
.docs-main h3 { margin-top: 22px; font-size: 1.08rem; }
.docs-main p, .docs-main li { color: #2b3340; }
.docs-main .muted { color: var(--muted); }
.docs-main pre.code { margin: 14px 0; }
.docs-main table.req { margin: 14px 0; }
.docs-main .callout { margin: 18px 0; }
.docs-main code { background: var(--panel); border: 1px solid var(--line); border-radius: 5px; padding: 1px 6px; font-family: var(--mono); font-size: .88em; }
.docs-main pre.code code { background: none; border: none; padding: 0; }
.docs-next { display: flex; justify-content: space-between; gap: 16px; margin-top: 40px; border-top: 1px solid var(--line); padding-top: 20px; }

@media (max-width: 860px) {
  .docs-wrap { grid-template-columns: 1fr; gap: 8px; }
  .docs-side { position: static; border-bottom: 1px solid var(--line); padding-bottom: 12px; margin-bottom: 8px; }
}

/* forms */
.form { max-width: 620px; margin-top: 24px; }
.form label { display: block; font-size: .9rem; font-weight: 600; margin: 14px 0 5px; }
.form input, .form select, .form textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px;
  font-family: inherit; font-size: .95rem;
}
.form textarea { min-height: 120px; resize: vertical; }

@media (max-width: 860px) {
  .proof .grid { grid-template-columns: repeat(2, 1fr); }
  .proof .cell:nth-child(2) { border-right: none; }
  .cards, .cards.two, .price { grid-template-columns: 1fr; }
  table.req { display: block; overflow-x: auto; }
  table.req td, table.req th { white-space: nowrap; }
  table.req, pre.code { scrollbar-width: thin; scrollbar-color: var(--muted) transparent; }
  table.req::-webkit-scrollbar, pre.code::-webkit-scrollbar { height: 8px; -webkit-appearance: none; }
  table.req::-webkit-scrollbar-thumb, pre.code::-webkit-scrollbar-thumb { background: var(--muted); border-radius: 4px; }
  table.req::-webkit-scrollbar-track, pre.code::-webkit-scrollbar-track { background: transparent; }
  .hero h1 { font-size: 2.2rem; }
  .nav .row { flex-wrap: wrap; height: auto; }
  .nav-toggle { display: inline-flex !important; align-items: center; justify-content: center; order: 2; margin-left: auto; font-size: 1.6rem; line-height: 1; padding: 2px 8px; cursor: pointer; color: var(--ink); }
  .nav .cta { display: none; }
  .nav nav { display: none; order: 4; width: 100%; flex-direction: column; align-items: stretch; gap: 0; margin: 6px 0 2px; }
  .nav-toggle-cb:checked ~ nav { display: flex; }
  .nav nav > a, .nav .navdrop > a { padding: 11px 2px; width: 100%; border-top: 1px solid var(--line); }
  .nav .navdrop { flex-direction: column; align-items: stretch; width: 100%; }
  .nav .navdrop > a::after { content: ""; }
  .nav .navdrop::after { display: none; }
  .nav .drop-menu { position: static; display: block; box-shadow: none; border: none; background: transparent; min-width: 0; padding: 0 0 6px 16px; }
  .nav .drop-menu a { padding: 8px 2px; border: none; }
}